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Home » GAT Subject » Botany Mcqs » Aptitude Test - 15
1.Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed?
A. Eyepiece lens
B. Objective lens
C. Condenser lens
D. Eyepiece lens
2.What is the minimum distance for the eye to focus any object?
A. 11 cm
B. 25 cm
C. 32 cm
D. 11 cm
3.Resolving power of a microscope is a function of?
A. Wavelength of light used
B. Numerical aperture of lens system
C. Refractive index
D. Wavelength of light used
4.The greatest resolution in light microscopy can be obtained with?
A. Longest wavelength of visible light used
B. An objective with minimum numerical aperture
C. Shortest wavelength of visible light used
D. Longest wavelength of visible light used
5.Oil immersion objective lens has an NA value of?
A. 0.65
B. 0.85
C. 1.33
D. 0.65
6.In fluorescence microscopy, which of the following performs the function of removing all light except the blue light?
A. Exciter filter
B. Barrier filter
C. Dichroic mirror
D. Exciter filter
7.Total Magnification is obtained by ?
A. Magnifying power of the objective lens
B. Magnifying power of eyepiece
C. Magnifying power of condenser lens
D. Magnifying power of the objective lens
8.In light microscopy, which of the following is used as fixatives prior to staining technique?
A. Osmic acid
B. Glutaraldehyde
C. Heat
D. Osmic acid
9.In Phase contrast microscopy, the rate at which light enters through objects is ?
A. Constant
B. Inversely proportional to their refractive indices
C. Directly proportional to their refractive indices
D. Constant
10.Which part of the light microscope controls the intensity of light entering the viewing area?
A. Coarse adjustment screw
B. Fine adjustment screw
C. Diaphragm
D. Coarse adjustment screw
11.Which of the following is used in electron microscope?
A. electron beams
B. magnetic fields
C. light waves
D. electron beams
12.Electron Microscope can give a magnification up to?
A. 400,000X
B. 100,000X
C. 15000X
D. 400,000X
13.Degree of scattering in transmission electron microscope is a function of?
A. wavelength of electron beam used
B. number of atoms that lie in the electron path
C. number and mass of atoms that lie in the electron path
D. wavelength of electron beam used
14.Negative Staining is used for examining _?
A. virus particles
B. protein molecules
C. bacterial flagella
D. virus particles
15.Which among the following helps us in getting a three-dimensional picture of the specimen?
A. Transmission Electron Microscope
B. Scanning Electron Microscope
C. Compound Microscop
D. Transmission Electron Microscope
16.The secondary electrons radiated back in scanning microscope is collected by?
A. specimen
B. anode
C. vacuum chamber
D. specimen
17.On what factors do the intensity of secondary electrons depend upon?
A. shape of the irradiated object
B. chemical composition of the irradiated object
C. number of electrons ejected
D. shape of the irradiated object
18.Where do we obtain the magnified image of the specimen in SEM?
A. cathode ray tube
B. anode
C. scanning generator
D. cathode ray tube
19.Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure?
A. Negative-Staining
B. Shadow Casting
C. Ultrathin Sectioning
D. Negative-Staining
20.The dye eosinate of methylene blue belongs to which group?
A. Acidic dye
B. Basic dye
C. Neutral dye
D. Acidic dye
21.What is the correct order of staining reagents in Gram-Staining?
A. Crystal violet, alcohol, iodine solution, safranin
B. Crystal violet, iodine solution, alcohol, safranin
C. Crystal violet, safranin, alcohol, iodine solution
D. Crystal violet, alcohol, iodine solution, safranin
22.Which bacteria appears purple-violet colour after staining?
A. Gram-positive
B. Gram-negative
C. Both Gram-positive and Gram-negative
D. Gram-positive
23.Gram-positive bacteria are usually more susceptible to?
A. streptomycin
B. streptomycin
C. streptomycin
D. streptomycin
24.Which of the staining technique helps in demonstrating spore structure in bacteria as well as free spores?
A. Acid-fast stain
B. Endospore stain
C. Capsule stain
D. Acid-fast stain
25.In Gram-staining, iodine is used as a?
A. fixative
B. mordant
C. solublizer
D. fixative
26.Which of the following is the example of Gram-negative bacteria?
A. Lactobacillus
B. Eschericia coli
C. Bacillus subtilis
D. Lactobacillus
27.Which of the following is incorrect about haplontic life cycle?
A. Gametophytes are the dominant phase in this life cycle
B. Sporophytes are free-living
C. Spores are haploid in nature and form gametophyte by mitotic division
D. Gametophytes are the dominant phase in this life cycle
28.Which among the following life cycle suits Chlamydomanas?
A. Haplontic
B. Diplontic
C. Triplontic
D. Haplontic
29.Which among the following is incorrect about diplontic life cycle?
A. Sporophyte is the dominant phase
B. All spermatophytes exhibit diplontic life cycle
C. Gametophyte depends on the sporophyte
D. Sporophyte is the dominant phase
30.Which among the following life cycle is exhibited by a rose plant?
A. Haplontic
B. Diplontic
C. Triplontic
D. Haplontic
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